They have linked to the wrong product. Search for "
SanDisk 2TB Extreme Portable USB 3.1 Type-C External SSD" instead on B&H and you'll find it.
Actually the post you link to specifically states that FOV is NOT an angle, whereas AOV is.
The internet is rife with confusion on this topic. So much so in fact, that I think the correct answer has been lost. You have Wikipedia stating that AOV and FOV can be used interchangeably, and yet they link to sources that clearly state they can't be. Some people claim FOV is an angular measurement, and some claim on AOV is, and that FOV should be a distance. It's a real mess :)